Fit for producing EPS foam sheet (KT boards), treat polystyrene as raw materials, foaming agent is injected under high pressure, products are finished via extruding, foaming, cooling, sizing, cutting, drawing and winding with excellent anti-shocking ability, sound insulation, warm-preservation, anti-damp, high security and high plastic suction, widely used for packing fruit, fruit, electronic products, daily articles, hardware and toys.